快慢时间域联合处理抑制C&I干扰

doi:10.3969/j.issn.1001-506X.2020.06.10

系统工程与电子技术 ›› 2020, Vol. 42 ›› Issue (6): 1274-1282.doi: 10.3969/j.issn.1001-506X.2020.06.10

快慢时间域联合处理抑制C&I干扰

张亮^1,²(), 王国宏¹(), 张翔宇¹(), 李思文¹()

1. 海军航空大学信息融合研究所, 山东烟台 264001
2. 中国人民解放军94326部队, 山东济南 250000

收稿日期:2019-10-17 出版日期:2020-06-01 发布日期:2020-06-01
作者简介:张亮(1987-),男,博士研究生,主要研究方向为雷达抗干扰、雷达信号处理技术。E-mail:332401479@qq.com|王国宏(1963-),男,教授,博士,主要研究方向为多源信息融合、雷达组网和微弱目标跟踪。E-mail:wangguohong@sina.com|张翔宇(1986-),男,讲师,博士,主要研究方向为雷达抗干扰和雷达数据处理技术。E-mail:396743451@qq.com|李思文(1993-),男,硕士研究生,主要研究方向为雷达抗干扰、雷达信号处理技术。E-mail:2954131080@qq.com
基金资助:
国家自然科学基金(61731023);国家自然科学基金(61701519);国家自然科学基金(61671462);“泰山学者”攀登计划专项经费资助课题

Fast-slow time domain joint processing to suppress C&I jamming

Liang ZHANG^1,²(), Guohong WANG¹(), Xiangyu ZHANG¹(), Siwen LI¹()

1. Institute of Information Fusion, Naval Aviation University, Yantai 264001, China
2. Unit 94326 of the PLA, Jinan 250000, China

Received:2019-10-17 Online:2020-06-01 Published:2020-06-01
Supported by:
国家自然科学基金(61731023);国家自然科学基金(61701519);国家自然科学基金(61671462);“泰山学者”攀登计划专项经费资助课题

摘要/Abstract

摘要：

频谱弥散(smeared spectrum, SMSP)干扰和切片组合(chopping and interleaving, C&I)干扰是两种用于对抗线性调频(linear frequency modulation, LFM)脉冲压缩雷达的干扰样式。相比SMSP干扰, C&I干扰与雷达发射信号相似度更高,干扰抑制更为困难。针对该问题,以远距离支援干扰下LFM相参雷达对抗C&I干扰为背景,提出快慢时间域联合处理C&I干扰抑制算法。分析了C&I干扰时频特征和对相参雷达的干扰特性,在此基础上,通过快慢时间域处理估计干扰位置、幅度、多普勒频率、采样周期、采样脉宽等参数,重构干扰信号,通过对消实现干扰抑制。仿真试验验证了所提算法的可行性和有效性。

关键词: 切片组合干扰, 干扰重构, 干扰对消

Abstract:

Smeared spectrum (SMSP) jamming and chopping and interleaving (C&I) jamming are invented to counter linear frequency modulation (LFM) pulse compression radar. Compared with SMSP jamming, C&I jamming is more similar to the radar transmitting signal, and more difficult to be suppressed. To solve this problem, a jamming suppression algorithm is proposed under the background of coherent radar countering C&I jamming. This paper studies the time-frequency characteristics of the jamming signal and the effect on coherent radar under the situation of stand-off jamming. On this basis, the jamming parameters such as position, amplitude, Doppler frequency, sampling period and sampling pulse width are estimated by joint processing in fast-slow time domain, and then the jamming signal is reconstructed. By subtracting the reconstructed signal from the echo, the purpose of jamming suppression is finally realized. The simulation results verifiy the feasibility and effectiveness of the proposed algorithm.

Key words: chopping and interleaving (C&I) jamming, jamming reconstruction, jamming cancellation

中图分类号:

TN947

张亮, 王国宏, 张翔宇, 李思文. 快慢时间域联合处理抑制C&I干扰[J]. 系统工程与电子技术, 2020, 42(6): 1274-1282.

Liang ZHANG, Guohong WANG, Xiangyu ZHANG, Siwen LI. Fast-slow time domain joint processing to suppress C&I jamming[J]. Systems Engineering and Electronics, 2020, 42(6): 1274-1282.

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类别	参数	参数值
雷达	载频/MHz	400
	脉宽/μs	40
	信号带宽/MHz	8
	采样频率/MHz	16
	脉冲重复频率/Hz	2 000
	相参积累个数	128
干扰机	类型	点目标
	径向距离/km	100
	多普勒频率/Hz	100
C&I干扰	脉宽/μs	40
	多普勒频率/Hz	300、400、600
	采样周期/μs	8、10、10
	个数/方位	3
	距离/km	10、35、60
	采样脉宽/μs	2、2.5、2
突防飞机1	类型	点目标
	回波信号幅度/V	1
	距离/km	45
	多普勒频率/Hz	500
突防飞机2	类型	点目标
	回波信号幅度/V	1
	距离/km	47
	多普勒频率/Hz	500

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快慢时间域联合处理抑制C&I干扰

Fast-slow time domain joint processing to suppress C&I jamming

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